Since the queries are dynamic, with unknown selection criteria at compile time, plan generation can be incorrect, even with the availability of full distribution statistics on the data.
由于查询是动态的，在编译时并不知道其选择标准，因此，即使有了关于数据的完整的分布统计，仍然可能生成错误的计划。
Currently, many business users spend too much time collecting, combining, consolidating, and distributing data when they use spreadsheets as their primary information distribution system.
目前，很多业务用户在使用电子表格作为主要信息分发系统时，花费过多时间来收集、组合、整合和分发数据。
All references to data are resolved at distribution time.
所有对数据的引用在发布时被解决。
Our application will have three main pieces of functionality - the distribution of real-time market data information, the creation of new trades, and the retrieval of a portfolio of trades.
我们的应用有三大主要功能——实时市场数据信息的分发，新交易的创建，以及证券交易的获取。
Architect Data Distribution Service for Real-Time Systems (DDS) applications to manage the complexity of interconnected components.
实时系统(DDS)程序的结构数据分布服务，以管理相互联系构件的复杂性。
Incidence degree could be used to analyse time series data in health system. There is little limit about data distribution and type of variable's correlation.
关联度分析方法可用于卫生系统内部时间序列资料的分析，该方法对数据分布类型、变量之间的相关类型限制较少。
A fixed sampling percentage size that was good at some point in time may not be appropriate after the data distribution in the table has changed.
手工固化采样比例在某一时间点可能是较好的，但是在数据分布发生变化后就可能不再那么合适了。
The evidence from molecular clocks, fossils and geographic distribution data on the origin time of angiosperms has been greatly accumulated in the past two decades.
分析了用于推测被子植物起源时间的分子、化石和地理分布证据。
Illustrate proper data distribution to decrease data average accessing time to a low level in datacasting disks and then to save mobile computer's electricity and bandwidth.
研究了如何在数据广播磁盘中设计适当的数据分配方式以减少数据项的平均访问时间，进而有效地节约移动计算系统的电源和带宽。
Variation of SST and its time-space distribution in the tropical western Pacific and the Indian ocean are studied by using the comprehensive ocean-atmosphere data set (COADS).
利用COADS资料对热带西太平洋和印度洋海表温度(SST)的变化分布进行了研究。
By experimental data analysis, the random change of the reciprocal induction time as well as the induction time is in conformity to logarithmic normal distribution.
实验数据分析表明，诱导时间的倒数的随机变化规律服从对数正态分布。同样，诱导时间亦服从对数正态分布。
SVC not only has a high time complexity but also gets low recognition rate when distribution of the data set is complex and uneven.
SVC算法不仅时间复杂度高，而且在处理分布复杂、不均匀样本时，识别率较低。
When a node of P2P distribution network is downloading data from a number of other nodes at the same time, it needs to schedule the downloading tasks.
当P 2 P分发网中一个节点同时从若干个其他节点获取数据时，需要对数据下载任务进行合理调度，并尽量按时完成更多的下载任务。
It was found that the reaction rate submitted normal distribution with reaction time and a normal distribution model was proposed to fit the kinetics data.
与随机孔模型对比，发现正态分布时间模型能较好地描述煤焦的气化动力学规律。
When distribution technology is used in it, aspects as dispersedness in space, parallelizability in time and data sharing are considered.
当其与分布式技术结合起来之后，更需要考虑空间离散化、时间并行化和数据共享等方面的问题。
Many different types of distributed applications can use the DDS to facilitate their real-time efficient distribution of data.
DDS为各种不同类型的分布式应用提供了数据通信模型，能促使数据实时、高效地分发。
Based on meteorological data of 7 stations in Qingdao during 1961-2004, the space-time distribution characteristic of sand-dust weather in Qingdao is analyzed.
利用青岛市7个站1961—2004年的气象资料，分析了青岛沙尘天气的时空分布特征。
Considering the requirement of data transmission reliability and real time in distribution transformers, a monitoring system of distribution transformer in real time based on GPRS was introduced.
针对配变监测系统对数据传输可靠性和实时性的要求，本文介绍了一种基于移动GPRS无线通信方式的配电变压器电力参数实时监测系统的设计方案。
However, most distribution network dose not realize automation, which makes it difficult to get the real-time operation data of the distribution network.
但是，由于大部分配电网并没有实施配网自动化，使得配网运行的实时数据难以获得。
Based on the 1961-2000 observational data of 11 weather stations in Chaidamu Basin, the time-space distribution characteristics of sandstorm weather in Chaidamu Basin are analyzed.
利用196 1 ~ 2 0 0 0年柴达木盆地11个气象站的沙尘暴观测资料，分析了柴达木盆地沙尘暴天气的时空分布特征。
On the basis of multi-sensor collecting data, we adopt distribution diagram method to wiping off the careless error at the same time.
实测表明，采用这种方法可以提高温度采集的精度，同时有效地解决了由于传感器失效引起的误差和单点采集温度的不足。
On the basis of multi-sensor collecting data, we adopt distribution diagram method to wiping off the careless error at the same time.
实测表明，采用这种方法可以提高温度采集的精度，同时有效地解决了由于传感器失效引起的误差和单点采集温度的不足。
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